CAS Registry Number
A CAS Registry Number,[1] also referred to as CASRN or CAS Number, is
a unique numerical identifier assigned by the Chemical Abstracts
Service (CAS) to every chemical substance described in the open
scientific literature (currently including all substances described
from 1957 through the present, plus some substances from the early or
mid 1900s), including organic and inorganic compounds, minerals,
isotopes, alloys and nonstructurable materials (UVCBs, of unknown,
variable composition, or biological origin).[2]
The Registry maintained by CAS is an authoritative collection of
disclosed chemical substance information. It currently identifies more
than 129 million organic and inorganic substances and 67 million
protein and DNA sequences,[3] plus additional information about each
substance
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Identifier
An identifier is a name that identifies (that is, labels the identity
of) either a unique object or a unique class of objects, where the
"object" or class may be an idea, physical [countable] object (or
class thereof), or physical [noncountable] substance (or class
thereof). The abbreviation ID often refers to identity, identification
(the process of identifying), or an identifier (that is, an instance
of identification). An identifier may be a word, number, letter,
symbol, or any combination of those.
The words, numbers, letters, or symbols may follow an encoding system
(wherein letters, digits, words, or symbols stand for (represent)
ideas or longer names) or they may simply be arbitrary. When an
identifier follows an encoding system, it is often referred to as a
code or ID code. Identifiers that do not follow any encoding
scheme are often said to be arbitrary IDs; they are arbitrarily
assigned and have no greater meaning
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Royal Society Of Chemistry
The
Royal SocietyRoyal Society of
ChemistryChemistry (RSC) is a learned society
(professional association) in the
United KingdomUnited Kingdom with the goal of
"advancing the chemical sciences". It was formed in 1980 from the
amalgamation of the Chemical Society, the Royal Institute of
Chemistry, the Faraday Society, and the Society for Analytical
ChemistryChemistry with a new Royal Charter and the dual role of learned
society and professional body. At its inception, the Society had a
combined membership of 34,000 in the UK and a further 8,000 abroad.[2]
The headquarters of the Society are at Burlington House, Piccadilly,
London. It also has offices in Thomas Graham House in
CambridgeCambridge (named
after Thomas Graham, the first president of the Chemical Society)
where RSC Publishing is based
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Academic PublishingAcademic publishing is the subfield of publishing which distributes
academic research and scholarship. Most academic work is published in
academic journal article, book or thesis form. The part of academic
written output that is not formally published but merely printed up or
posted on the Internet is often called "grey literature". Most
scientific and scholarly journals, and many academic and scholarly
books, though not all, are based on some form of peer review or
editorial refereeing to qualify texts for publication. Peer review
quality and selectivity standards vary greatly from journal to
journal, publisher to publisher, and field to field.
Most established academic disciplines have their own journals and
other outlets for publication, although many academic journals are
somewhat interdisciplinary, and publish work from several distinct
fields or subfields
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Dictionary Of Chemical Formulas
This is a list of common chemical compounds with chemical formulas and
CAS numbers, indexed by formula. This complements alternative listing
at inorganic compounds by element
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European Community Number
The
European Community numberEuropean Community number (EC Number) is a unique seven-digit
identifier that was assigned to substances for regulatory purposes
within the
European UnionEuropean Union by the European Commission. The EC Inventory
comprises three individual inventories, EINECS, ELINCS and the NLP
list.[1]European Inventory of Existing Commercial Chemical Substances (EINECS)Contents1 Structure
2 EC Inventory
3 List numbers
4 See also
5 References
6 External linksStructure[edit]
The EC Number may be written in a general form as: NNN-NNN-R,[2] where
R is a check digit and N represents integers. The check digit is
calculated using the ISBN method
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Enzyme Commission Number
The
EnzymeEnzyme Commission number (EC number) is a numerical classification
scheme for enzymes, based on the chemical reactions they catalyze.[1]
As a system of enzyme nomenclature, every EC number is associated with
a recommended name for the respective enzyme.
Strictly speaking, EC numbers do not specify enzymes, but
enzyme-catalyzed reactions
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International Union Of Pure And Applied Chemistry
The
InternationalInternational Union of Pure and Applied
ChemistryChemistry (IUPAC)
/ˈaɪjuːpæk/ or /ˈjuːpæk/ is an international federation of
National Adhering Organizations that represents chemists in individual
countries. It is a member of the
InternationalInternational Council for Science
(ICSU).[2] IUPAC is registered in Zürich, Switzerland, and the
administrative office, known as the "IUPAC Secretariat", is in
Research Triangle Park, North Carolina, United States. This
administrative office is headed by IUPAC's executive director,[3]
currently Lynn Soby.[4]
IUPAC was established in 1919 as the successor of the International
Congress of Applied
ChemistryChemistry for the advancement of chemistry. Its
members, the National Adhering Organizations, can be national
chemistry societies, national academies of sciences, or other bodies
representing chemists
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PubChemPubChem is a database of chemical molecules and their activities
against biological assays. The system is maintained by the National
Center for Biotechnology Information (NCBI), a component of the
National Library of Medicine, which is part of the United States
National Institutes of HealthNational Institutes of Health (NIH).
PubChem can be accessed for free
through a web user interface. Millions of compound structures and
descriptive datasets can be freely downloaded via FTP. PubChem
contains substance descriptions and small molecules with fewer than
1000 atoms and 1000 bonds. More than 80 database vendors contribute to
the growing
PubChem database.[1]Contents1 Databases
2 Searching
3 History
4 ACS's concerns
5
DatabaseDatabase fields
6 See also
7 References
8 External linksDatabases[edit]
PubChem consists of three dynamically growing primary databases
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Registration Authority
Registration authorities exist for many standards organizations, such
as ANNA (Association of National Numbering Agencies for ISIN), the
Object Management Group, W3C,
IEEEIEEE and others. In general,
registration authorities all perform a similar function, in promoting
the use of a particular standard through facilitating its use. This
may be by applying the standard, where appropriate, or by verifying
that a particular application satisfies the standard's tenants.
Maintenance agencies, in contrast, may change an element in a standard
based on set rules – such as the creation or change of a currency
code when a currency is created or revalued (i.e. TRL to TRY for
Turkish lira)
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